More than a pet peeve actually; nearly a burning rage. People who go to watch their hometown sports team, and then proceed to root for the other team. At the dome the other night, I swear the Red Sox fans were just as loud, if not louder, than the Twins fans. There is no way that many people traveled from Boston. So why are all of these Minnesotans rooting for the other team (whom we spanked 6-2 by the way)? It pisses me off. And this applies to all sports and levels (i.e. Olympics, local teams, college, etc.).
C'mon people, show some spirit and root for YOUR home team!